db2mag
Convert decibels to magnitude
Syntax
Description
Examples
Magnitudes of Random Numbers
Generate a 2-by-4-by-2 array of Gaussian random numbers. Assume the numbers are expressed in decibels and compute the corresponding magnitudes.
r = randn(2,4,2); mags = db2mag(r)
mags = mags(:,:,1) = 1.0639 0.7710 1.0374 0.9513 1.2351 1.1044 0.8602 1.0402 mags(:,:,2) = 1.5098 0.8561 1.0871 1.0858 1.3755 1.4182 0.9928 0.9767
Use the definition to check the calculation.
chck = 10.^(r/20)
chck = chck(:,:,1) = 1.0639 0.7710 1.0374 0.9513 1.2351 1.1044 0.8602 1.0402 chck(:,:,2) = 1.5098 0.8561 1.0871 1.0858 1.3755 1.4182 0.9928 0.9767
Input Arguments
ydb
— Input array in decibels
scalar | vector | matrix | N-D array
Input array in decibels, specified as a scalar, vector, matrix, or N-D
array. When ydb
is nonscalar, db2mag
is an element-wise operation.
Data Types: single
| double
Output Arguments
y
— Magnitude measurements
scalar | vector | matrix | N-D array
Magnitude measurements, returned as a scalar, vector, matrix, or N-D array
of the same size as ydb
.
Version History
Introduced in R2008a
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